Hello,
I just replaced the PCV on my 94 850 Turbo. I am 99 percent sure I have all lines and hoses connected correctly. The problem is that whenever I drive the car, it almost wants to stall out when slowing down and especially at a stop. It doesn't seem to change when I shift to neutral. Also, it doesn't seem to matter if the car is at operating temp or still cold.

 

Did it behave like that before? If not you obviously didn't install everything correctly. This could be a vacuum leak, intake manifold leak, or something else. I'd start by checking for leaks in these areas. A smoke test is best but if you spray carb cleaner on an affected leaking area the idle will change. Also, is it setting off a CEL?

 

did you re connect your maf?

 

That would definitely set off the CEL, LOL! Of course, maybe his CEL bulb's burned out and he's really in the dark here, who knows?

In any case, it's obviously something he either didn't reconnect, didn't connect or fit right, or just left off during the job.

 

Didnt do it before, MAF is reconnected, read codes and got nothing.

 

something else i noticed. the car wont build full boost unless I unplug the tcv then replug it in will build full boost. is this the computer compensating for the possible air leak? and for some reason the A6 port on my box doesnt work so no way to read those codes...

 

is there anything else besides a vacuum leak that could cause this?